[Internal] Automatically trigger integration tests on PR (#800)

## Changes
Automatically trigger integration tests when a PR is opened or updated

## Tests
Updated workflow triggered the tests. On success, the tests marked the
check as succesfull.

- [ ] `make test` passing
- [ ] `make fmt` applied
- [ ] relevant integration tests applied

.github/workflows/integration-tests.yml

@@ -0,0 +1,59 @@
+name: Integration Tests
+
+on:
+
+  pull_request:
+    types: [opened, synchronize]
+
+  merge_group:
+
+
+jobs:
+  trigger-tests:
+    if: github.event_name == 'pull_request'
+    name: Trigger Tests
+    runs-on: ubuntu-latest
+    environment: "test-trigger-is"
+
+    steps:
+    - uses: actions/checkout@v3
+
+    - name: Generate GitHub App Token
+      id: generate-token
+      uses: actions/create-github-app-token@v1
+      with:
+        app-id: ${{ secrets.DECO_WORKFLOW_TRIGGER_APP_ID }}
+        private-key: ${{ secrets.DECO_WORKFLOW_TRIGGER_PRIVATE_KEY }}
+        owner: ${{ secrets.ORG_NAME }}
+        repositories: ${{secrets.REPO_NAME}}
+
+    - name: Trigger Workflow in Another Repo
+      env:
+        GH_TOKEN: ${{ steps.generate-token.outputs.token }}
+      run: |
+        gh workflow run sdk-py-isolated-pr.yml -R ${{ secrets.ORG_NAME }}/${{secrets.REPO_NAME}} \
+        --ref main \
+        -f pull_request_number=${{ github.event.pull_request.number }} \
+        -f commit_sha=${{ github.event.pull_request.head.sha }} 
+
+  # Statuses and checks apply to specific commits (by hash). 
+  # Enforcement of required checks is done both at the PR level and the merge queue level.
+  # In case of multiple commits in a single PR, the hash of the squashed commit 
+  # will not match the one for the latest (approved) commit in the PR.
+  # We auto approve the check for the merge queue for two reasons:
+  # * Queue times out due to duration of tests.
+  # * Avoid running integration tests twice, since it was already run at the tip of the branch before squashing.
+  auto-approve:
+    if: github.event_name == 'merge_group'
+    runs-on: ubuntu-latest
+    steps:
+      - name: Mark Check
+        env:
+          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        shell: bash
+        run: |
+            gh api -X POST -H "Accept: application/vnd.github+json" \
+              -H "X-GitHub-Api-Version: 2022-11-28" \
+              /repos/${{ github.repository }}/statuses/${{ github.sha }} \
+              -f 'state=success' \
+              -f 'context=Integration Tests Check'